cranial nerves and their dysfunction

Question 1

I Olfactory

Answer 1

Unilateral or bilateral anosmia.

Question 2

I Optic

Answer 2

Optic atrophy, papilledema, amblyopia, field defects.

Question 3

IIl Oculomotor

Answer 3

Diplopia, ptosis of lid, dilated pupil, inability to focus on close
objects.

Question 4

IV Trochlear

Answer 4

Convergent strabismus, diplopia

Question 5

V Trigeminal

Answer 5

Tic douloureux, loss of facial sensation, decreased ability to
chew, loss of corneal reflex, decreased blinking.

Question 6

VI Abducens

Answer 6

Diplopia, strabismus.

Question 7

VII Facial

Answer 7

Bell’s palsy, decreased ability to distinguish tastes.

Question 8

VIII
Vestibulocochlear

Answer 8

Tinnitus, vertigo, deafness

Question 9

IX
Glossopharyngeal

Answer 9

Loss of “gag” reflex, loss of taste, difficulty swallowing.

Question 10

X Vagus

Answer 10

Loss of voice, impaired voice, difficulty swallowing.

Question 11

XI Accessory

Answer 11

Difficulty with shrugging of shoulders, inability to turn head to
left and right.

Question 12

XII Hypoglossal

Answer 12

Difficulty with speech and swallowing, inability to protrude
tongue.